Staple strip



May 20, 1941. A. E. CARLILE 2,242,967

STAPLE STRIP Original Filed Jan. 5, 1939 jaw fw I INVENTOR. fllfred E! 'arLi 1e.

A TTORNEY.

Patented May 20, 1941 STAPLE STRIP Alfred E. Carlile, Meadvllle, Pa., assignor to Talon, Inc., a corporation of Pennsylvania Original application January 5, 1939, Serial No.

249,456. Divided and this application November 17, 1939, Serial No. 304,958

1 Claim.

This invention relates to staple bottom stop strips for use in staple setting machines which .apply staple bottom stops on slide fasteners subsequent to attachment of the slide fasteners to garments.

In applying slide fastener assemblies to certain arments, for example trousers, it has been learned in practice that it is most feasible to construct the garment in complete halves with a slide fastener stringer attached to each of the respective opposed parts, and thereafter to join the halves together. In such constructions, it is necessary to join the bottom ends ,of the stringers after the halves of the garment have been secured together. In other words, a permanent bottom stop must be applied to the stringers of the slide fastener at the ends of the rows of interlocking elements thereof. A machine for applying staple bottom stops to the stringer ends in such relationship is described and claimed in my copending application, Serial No. 249,456, filed January 5, 1939, for Staple setting machine, of which application, this application is a division.

It is the primary object of this invention to provide a staple bottom stop strip construction particularly adapted for use in the abovedescribed machine and comprising a strip of preformed staples joined together by a portion between the staples notched to an angle of from 30 to 45 for cooperation with the transfer plunger and setting head of the same machine.

These and other objects and advantages of the invention will appear from the following de scription taken in conjunction with the accompanying drawing which forms a part thereof, and will be pointed out in the appended claim.

In the drawing:

Fig. 1 is a view, in section, illustrating the operation of the transfer and setting mechanism of the machine for use in which the staple bottom stop strip of this invention is particularly adapted;

Fig. 2 is an enlarged perspective view of a portion of a slide fastener staple bottom stop strip according to this invention;

Fig. 3 is an enlarged view, in side elevation, of a staple bottom stop strip' according to this invention, showing the notches formed in the strip between the staples defined by the notches; and

Fig. 4 is an enlarged diagrammatic view illustrating the manner in which the transfer plunger acts against the end staple of a strip, breaking if off at the point of the notch for application to slide fastener stringer tapes.

Fragmentary showings of the machine for use in which the staple bottom stop strip of this invention is particularly adapted, are made in Figs. 1 and 4 of the drawing. As shown in Fig. l, the staple bottom stop setting machine includes a head or housing it provided with a substantially vertical strip guide channel ll, across the bottom of which reciprocates a transfer plunger l4 slidably supported. in a substantially horizontal slideway l2, at the bottom of which is disposed a staple bottom stop strip retaining plate i5, upon which the transfer plunger H slides. Forwardly of the strip guide channel H, the housing I0 is provided with a substantially vertical slideway in which is supported a staple setting plunger It. At its lower end, the setting plunger i6 is provided witha centrally disposed setting head IT, at each side of which is provided a flat side spring I 8. Normally, the transfer plunger I4 is disposed rightwardly with respect to the position shown in Fig. 1.

Treadle operated manual means (not shown) is provided for accomplishing the operative cycle of the machine comprising reciprocatory movement of the transfer plunger H from the abovedescribed position to the intermediate position shown in Fig. 1 in full lines, and thereafter; to the dotted line position shown in Fig. 1. During this movement, the transfer plunger will encounter the end staple of a strip, sever it from the strip, as shown in Figs. 1 and 4, and carry it to the dotted line position shown in Fig. 1. After this has been accomplished, the transfer plunger I4 is automatically retracted, while the severed and transferred staple is retained between the side springs l8 resiliently engaging it at each side. Thereafter, the staple setting plunger i6 is thrust downwardly to cause the staple to be set in position and clenched upon encountering a setting anvil disposed below the setting plunger l6 and its setting head H, as shown and described in my above-described copending application.

The transfer plunger H, as shown particularly in Fig. 4, is provided adjacent its end with an inclined surface Ha extending from the end of the transfer finger It to a horizontal surface [4b, terminating in the inclined shoulder c. The length. of the flat, horizontal surface Mb is substantially equal to the length of one staple unit of the staple bottom stop strip.

The staple strip 20, as shown in Figs. 2, 3 and 4, is of substantially U-shaped cross section and the upper surface thereof is provided with transverse notches 2| extending substantially halfway therethrough and defining an angle A of from 30 degrees to 45 degrees. A complete staple bottom stop 22 is formed between each pair of notches 2|. These staple bottom stops are secured together to form a continuous strip by the web of metal adjacent the slot. 2| between each pair of staples 22. The side flanges of the strip 20 are cut out to form pairs of legs or prongs 23 at each side of each staple 22. The flat portion of each staple between the notches 2| is herein termed the back of the staple.

It is of extreme importance that the angularity of the notches 2| be between 30 and 45 degrees, which are critical limits of the angle, in order that a clean break shall be secured in the web adjacent each notch 2| upon cooperation of the transfer plunger l4 with the forward edge ||a of the strip guide channel H, as shown in Fig. 4.

The strip 20 is usually formed of copper nickel alloy which will not break, without notching, even though the staple units were bent 90 degrees with respect to the strip proper. Where, however, the angle A is between 30 and 45 degrees, then when the end staple unit 22 is bent from 30 to 35 degrees from the strip proper, as shown in Fig. 4, the sides of the notch 2| are in engagement. This bending is accomplishedby engagement of the inclined surfaces Ha of theti'ansfer plunger M with the inner surface by the staple unit 22. After the reduced web adjacent the notch 2| has been so far stretched, further tension thereon will cause it to snap with a clean break in such manner that the end surfaces of the detached end staple member 22 are clean. After this fracture has occurred, the detached end staple member 22 rides up the inclined surface |4a to the flat or horizontal surface Mb where the rear edge thereof, which has just been fractured, engages the inclined shoulder Mo which prevents further movement with respect to the transfer plunger ll, then moving forward. The end staple member 22 remains on the surface Hb and is carried forward to the position shown in dotted lines in Fig. 1, whereafter, upon retraction of the transfer plunger ll, it will be resiliently held between the side springs I8 in abutment with the setting head ll of the setting plunger l6.

While I have shown and described in this application one embodiment which my invention may assume in practice, it will be understood that this embodiment is merely for the purposes of illustration and that various other forms may be devised within the scope of the invention and the operative range hereinbefore described and as set forth in the appended claim.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

A strip of preformed staples each staple being of generally U-shape and having a back and at least one prong extending therefrom on each side of the back, said staples being aligned in the strip and integrally joined at their backs only, said strip having notches of V-shaped crosssection, the sides of the notches forming an angle with each other of between 30 and said notches extending across the same at the junction lines between the staples, the depth of the notches extending substantially half way through the material of the back so that the staples are connected by a web of material relatively thinner than the material of the back, said connection being frangible so that the end staple can he separated from the strip upon bending of the end staple in that direction which swings the staple prongs away from the prongs of the, adjacent staple in the strip to a predetermined angle with relation to the strip which is not substantially greater than ALFRED E. CARLILE.

CERTIFICATE OF CORRECTION. Patent No. 2,242,967- May 20, 1914.1.

ALFRED E. CARLILE.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, sec- 0nd column, line 141, for "clenched" read "clinched-1 page 2, first column, line 28, for "55" read "14.5"; and that the said Letters Patent should be read witlrthis correction therein that the same may conform to the recor'd of the case in the Patent Office.

Signed and sealed this 18th day of November, A. D. 19m.

Henry Van Arsdale, (Seal) Acting Commissioner of Patents. 

